A "pantone sample" document, provided as a PSD. It's a good way to showcase a colour scheme to a potential client, with primary, secondary, tertiary, and background colours. It puts across a very professional image!

A faithful recreation of the contacts interface on iOS 7. This one is for education purposes, but it's fun to deconstruct things and look at how this popular interface was designed, for inspiration in your own design work.

A beautiful wallpaper design based on Max Bill's/Otl Aicher's famous poster design from the 1972 Olympics.
Everything from the angularity to the co-joining colour frames seems to aptly elicit the overall feel of iOS 7, so I decided to turn the poster rendition into a wallpaper.